代码共享如下，在Win2K sp4/WinXP sp2上调试通过。

BOOL CheckFileTrust( LPCWSTR lpFileName )
{
BOOL bRet = FALSE;
WINTRUST_DATA wd = { 0 };
WINTRUST_FILE_INFO wfi = { 0 };
WINTRUST_CATALOG_INFO wci = { 0 };
CATALOG_INFO ci = { 0 };

HCATADMIN hCatAdmin = NULL;
if ( !CryptCATAdminAcquireContext( &hCatAdmin, NULL, 0 ) )
{
return FALSE;
}

HANDLE hFile = CreateFileW( lpFileName, GENERIC_READ, FILE_SHARE_READ,
NULL, OPEN_EXISTING, 0, NULL );
if ( INVALID_HANDLE_VALUE == hFile )
{
CryptCATAdminReleaseContext( hCatAdmin, 0 );
return FALSE;
}

DWORD dwCnt = 100;
BYTE byHash[100];
CryptCATAdminCalcHashFromFileHandle( hFile, &dwCnt, byHash, 0 );
CloseHandle( hFile );

LPWSTR pszMemberTag = new WCHAR[dwCnt * 2 + 1];
for ( DWORD dw = 0; dw < dwCnt; ++dw )
{
wsprintfW( &pszMemberTag[dw * 2], L"%02X", byHash[dw] );
}

HCATINFO hCatInfo = CryptCATAdminEnumCatalogFromHash( hCatAdmin,
byHash, dwCnt, 0, NULL );
if ( NULL == hCatInfo )
{
wfi.cbStruct = sizeof( WINTRUST_FILE_INFO );
wfi.pcwszFilePath = lpFileName;
wfi.hFile = NULL;
wfi.pgKnownSubject = NULL;

wd.cbStruct = sizeof( WINTRUST_DATA );
wd.dwUnionChoice = WTD_CHOICE_FILE;
wd.pFile = &wfi;
wd.dwUIChoice = WTD_UI_NONE;
wd.fdwRevocationChecks = WTD_REVOKE_NONE;
wd.dwStateAction = WTD_STATEACTION_IGNORE;
wd. lor="#000000">dwProvFlags = WTD_SAFER_FLAG;
wd.hWVTStateData = NULL;
wd.pwszURLReference = NULL;
}
else
{
CryptCATCatalogInfoFromContext( hCatInfo, &ci, 0 );
wci.cbStruct = sizeof( WINTRUST_CATALOG_INFO );
wci.pcwszCatalogFilePath = ci.wszCatalogFile;
wci.pcwszMemberFilePath = lpFileName;
wci.pcwszMemberTag = pszMemberTag;

wd.cbStruct = sizeof( WINTRUST_DATA );
wd.dwUnionChoice = WTD_CHOICE_CATALOG;
wd.pCatalog = &wci;
wd.dwUIChoice = WTD_UI_NONE;
wd.fdwRevocationChecks = WTD_STATEACTION_VERIFY;
wd.dwProvFlags = 0;
wd.hWVTStateData = NULL;
wd.pwszURLReference = NULL;
}
GUID action = WINTRUST_ACTION_GENERIC_VERIFY_V2;
HRESULT hr = WinVerifyTrust( NULL, &action, &wd );
bRet = SUCCEEDED( hr );

if ( NULL != hCatInfo )
{
CryptCATAdminReleaseCatalogContext( hCatAdmin, hCatInfo, 0 );
}
CryptCATAdminReleaseContext( hCatAdmin, 0 );
delete[] pszMemberTag;
return bRet;
}

这段代码是在一个老外的论坛上不经意搜索到的，一个貌似德国人（因为他的注释不是英文写的，德国亦仅猜测尔，西班牙、葡萄牙、法兰西、俄罗斯亦都有可能）写的Delphi代码，其中使用了WinTrust.dll中的导出函数。使用VS2005的朋友们可以包含WinTrust.h、SoftPub.h和Mscat.h，并添加导入库WinTrust.lib；使用VC6的朋友们可以参考MSDN上的函数及结构体声明，并用函数指针进行调用。

本人补充一下一些类型，方便翻译成别的语言:
typedef struct _WINTRUST_DATA
{ DWORD cbStruct;
LPVOID pPolicyCallbackData;
LPVOID pSIPClientData;
DWORD dwUIChoice;
DWORD fdwRevocationChecks;
DWORD dwUnionChoice;
union {
struct WINTRUST_FILE_INFO_* pFile;
struct WINTRUST_CATALOG_INFO_* pCatalog;
struct WINTRUST_BLOB_INFO_* pBlob;
struct WINTRUST_SGNR_INFO_* pSgnr;
struct WINTRUST_CERT_INFO_* pCert;
};
DWORD dwStateAction;
HANDLE hWVTStateData;
WCHAR* pwszURLReference;
DWORD dwProvFlags;
DWORD dwUIContext;
} WINTRUST_DATA, *PWINTRUST_DATA;

typedef struct WINTRUST_FILE_INFO_
{ DWORD cbStruct;
LPCWSTR pcwszFilePath;
HANDLE hFile;
GUID* pgKnownSubject;
} WINTRUST_FILE_INFO, *PWINTRUCT_FILE_INFO;

typedef struct WINTRUST_CATALOG_INFO_
{ DWORD cbStruct; DWORD dwCatalogVersion;
LPCWSTR pcwszCatalogFilePath;
LPCWSTR pcwszMemberTag;
LPCWSTR pcwszMemberFilePath;
HANDLE hMemberFile;
} WINTRUST_CATALOG_INFO, *PWINTRUST_CATALOG_INFO;

typedef struct CATALOG_INFO_
{ DWORD cbStruct;
WCHAR wszCatalogFile[MAX_PATH];
} CATALOG_INFO;

本人再补充一下用到的API声明:
LONG WINAPI WinVerifyTrust(
__in HWND hWnd,
__in GUID* pgActionID,
__in LPVOID pWVTData
);